Brake mechanism for motor-cars.



A. L. CAMPBELL. BRKKE MECHANISM FOR MOTOR CARS APPLICATION FILED AUG-22.1915.

1,222,929. Patented Apr. 17, 1917.

5 S HEETSSHEET I.

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i N 2 I -'w Mm! 1'"- If"; I V I M w/ I 7 uvwawrox. BY I L. CAMPBELL.BRAKE MECHANISM FOR MOTOR CARS.

APPLICATION FILED AUG-22. HHS.

' Patented Apr. 17,1917.

5 SHEETS-SHEET 2.

A TTORNEYS.

A. L. CAMPBELL.

Patented Apr. 17, 1917.

5 SHEETS-SHEET 3.

IN VEN TOR.

4: fZ-A ATTORNEYS.

A. L. CAMPBELL.

BRA'K E MECHANISM FOR MOTOR CARS Batented Apr? 17, 1917.

5 SHEETSSHEET 4 A. L. CAMPBELL.

BRAKE MECHANISM FOR MOTOR CARS. APPLICATION FILED AUG-22.1916.

5 SHEETS-SHEET 5.

ATTORNEYS.

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a citizen of the United States, residing at 31 Twenty-fifth street,Elmhurst, in the county of'Queens and State of New York, have invented anew and useful Improvement in Brake Mechanisms for Motor-Cars, of whichthe following is a specification.

My invention relates generally to improvements in the brake mechanism ofmotor cars and more specifically to improvements in the means'formounting the brakes on the wheels, for operating the brakes, and foradjustingpthe brakes. In order t at my invention may be full understood,I shall first describe in detail p .in which are secured refilaceably bybolts 29 the mode in which I at present prefer to carry my inventioninto practice, and thenpoint'out the various features of the inventionand define their scope in the claims.

Reference is to be had to the accompany-' ingdrawings forming-partlofthis specificationin which like parts are designated by similar numbersin all thefigures. I

Figure 1 is aplan view, partly sectional, showlng brake mechanismembodying my invention applied to the rear axle housing and wheel of amotor. 4 I p Fig. 2is a sectionalside view of the same on the line 2 -2,Fig. 1.

Fig. 3 s

on the line 4-4, Fig. 2. a

Fig. 5 is a sectional side view on the line 5--5, Fig. 1.

. Fig. 6 1s a detail sectional side view showing the'wheel spider onwhich the brake shoes are mounted.

- Fig. 7 is an enlarged sectional view of one ofthe brake shoe adjustingdevices. v

. Fig. 8' is an enlarged sectional view of one ofthe brake shoeexpanding levers.

.' Fig. ,9 is' a detail sectional side view on.

the line 99, Fig. 4;

Fig. 10

of the rear wheels and 14 and 15 concentric brake drums on the wheel'13,'and-16 and 17 the outer and inner lined brake shoes respectively,which in this example'of my Specification of Letters Patent.

a .cross-sectlonal' view on the line a Fig. 4 is an enlargedcross-sectional view is a detail sectional side view on the 11118 10-10,Fig. 4.

Application filed August 22,1918. Serialll'o. 116,209.

fitted over and keyed to the rear axle hous-;

mg 12, inside the wheel 13, with diametrica ly opposite radial arms 20and 21, with arms 22 and. 23 radially on opposite sides of the arm 21,and with lugs 24 and 25 to which the, in this case, cantaliver spring"26 is secured. 7

On the spider arm 20' are integrally formedtap'oring socket bearings '27and 28 of the semi-circular outer and inner brake shoes 16 and 17respectively, the opposin ends of theis'ocket bearings 27' and ,28, an

Patented Apr. 17, 1917.

caps 33 and 134' onthe inner ends ofthe pivot bearin s 31 and 32, beingundercut or" flange as shown, to retainthe correspondingly cutorg-flanged edges o'fithe shoe pivot bearin s. p

- In t e1arr 1s22 18 are'fixedjguide pins 35 and 36, on which playcorresponding'slots in the brake shoes 16 and 17 iespectively, as thebrake shoes expand and contract. Theop site semicircular sections of thebrake s oes .16 and 17 'are press ad together on their'pivotbeari ingsand their actuating bearings hereinafter descrilc ed, by springs 37 and38, and 39 a .nd 23 "(if the 'brake spider and 40, which thus-tend 'tocontract brake shoes and release the brakes.

The'spider arm 21 is formed integrally with sleeve bearings 43 and 44,in which are mounted to turn rock shafts 41 and 42 carrying on thefirouter' ends cross-levers 45 and.

46, the opposite arms of which. armformed with ball sockets 47 and 48facing the op osing free ends of the brake shoes 16 and 17 The innerends of the rock shafts 41 and 42 are mountedto turn in bearin s 49 and540 on a bracket 511fixed to the axle ousing 12.

In theball sockets 47,.are fitted to turn universally l iallsfl52, 53,formed on the ends nected to I05. .of longitudinally adjustable links,54, 55,1 the other. ends of whichcijregpivotally con the. ends of} the'res'pective' brake 1 shoesections" 16, 1(-,-"s'o that when the rockshafts 4 4 are in one direction,

the respective brake shoes 16,, '17 will be expanded and tightenedagainst the respective brake drums14, 15, and when the rock shafts 41reotion, the brake springs 37, 38 and 39, 40

will contract-and release the brake shoes 16,

-17, from the respective brake drums 14, 15.

For adjusting the brake shoes 16, 17, with respect to the brake drums15, 16, the actulflating link's 54, 55 are each made of telescopicsections threaded together, as shown in detail in Fig. 7, and providedwith lock nuts, so that the sections of the links 54, 55, can beadjustedlongitudinally and locked in position with respect to each other, and

' the links thus ad'usted to the proper length.

thus setting or releasing the brakes at will, rock shaft actuating arms56, 57' are fixed 'adjustablyon the rock shafts as hereinafterdescribed, and connected tothe usual brake cables58, 59, which are inturn connected with the emergency and working brake operating hand andfootlevers in the usual way. To, provide for tightening the brake cableswith respect to the brake shoe actuating 57, as fixed on sleeves 60, 61,which are 80 fitted on so as to be adjustable aroundandmovable-lengthwise on the 'rock shafts-41,

- V 42 and are held in position thereon when adjulsted 'by'locking nuts76,-77. s

a The adjustable sleeves 60, 61 are formed 5 with disks 62, 63 formedwith a peripheral 'seriesof pin holes 64, 65, to receive removably aperipheral series of projecting pins 66, 67, which are fixed in a.peripheral series a of pin holes formed in collars 68, 69, loosely 40surrounding the rock shafts 41 and 42. The

' "opposite projecting ends of'the pins 66, 67 are fitted to enterremovably a peripheral series of pinholes 70, 71, formed in disks'--;72,"-73,- on sleeves 74,75, which sur 'ifi' i'bund and are keyed tothe rock shafts 41,

tlfie fixed. bearings 49, 50.

r equi-distant pins 66, 67, in the collars and .there are twelve pinholes in each theadjustable disks 62,63, and sixteen pin e's iii each ofthe keyed disks 72, 7 3, the mbersofpi'n holes twelve and sixteenbemultiples of the number four of pins in icollars ,68, '69. E

ith thi's construction, by loosening the nn 76, '77,. and withdrawingthe loose disks 42 are turned in the opposite di-.

For turning t 1e rock shafts 41, 42, and

'or adjusting the brake'operating arms 56, 57,

levers 45, 46, the brake operating arms 56,

' l 1 42 -and-1t11-r'll ,.with said shafts 41, 42, within' this exampleof my'invention there are i spect to the rock shafts 41, 42 and brakeoperating levers 45, 46,. for tightening or loosening the brake cables58, 59.

It is evident that many of the features of my invention herein describedmay be used independently of each other and may be greatly varied ,inconstruction and arrangement without departing from the spirit and scopeof my invention, for a definition of whichreference is to be had to thefollowing claims.

I claim as my invention:

1. The combination, with the wheel, the brake drum, the slotted brakeshoe sections, the axle and the axle housing, of a spider formedintegrally with a sleeve fixed on the axle housing and with oppositearms formed respectively with a bearing for the pivot of the brake shoesections, and bearing for the actuating lever of the brake shoe, andwith a lateral arm and a guide pin carried by said lateral arm, on.which plays the slot in the corresponding brake shoe section.

2. The combination, with the wheel, the

brake drum, the brake shoe sections, the axle and the'axle housing, ofa, spider arm bearing, an undercut cap fixed on said pivot,

and brake shoe sections havingtheir edges cut to enter the undercutsocket bearing and cap.

3. The combination, with-the brake jactu-- ating rock shaft, of a diskfixed thereon with a peripheral series of pin holes, a disk loosethereon formed with a peripheral series of pinholes, a loose collarinterposed between the disks and pins fixed in said collar to.

enter corresponding-holes inboth disks.

4. The combination, with the brake actuating rock shaft, of a disk fixedthereon formed with a peripheral series of pin holes adisk loose thereonformed with a-series of peripheral holes of a different number fromthose of the tight disk, a collar interposed between the disks, and pinsfixed in the collar, ,of a number of which the numbers of. a, v

holes-in both disks are different multiples.

. ALFRED L. CAMPBELL.

